Combination cutter and guard



July 14, 1931. R. ,1. CROSSMAN COMBINATION CUTTER AND GUARD Filed Dec.27, 1927 3mm Rosa-9rd. (kOSS/VAN DIV Patented July 14, 1931 ATENT-OFFICEROBERT J. oRossMAN. or SAN FRANCISCO, CALIFORNIA COMBINATION CUTTER, ANDGUARD Application filed December 7.1927. Serial No, 242,735.

My invention relates to improvements in a combination cutter and guard,and it con sists in the combinations, "constructions, and arrangementshereinafter described and claimed. g q i An object of'my invention is toprovide a combinationcutter and guard that is de signed especially fortrimming the top lift of ting beyond the planes coinciding with theheel.

A further object of my invention is to provide a device of the typedescribed which is extremely simple in construction, and which isadjustable for adapting itself to heels of various sizes. The device maybe attached to astandard machine with but slight alterations beingnecessary in the latter.

Other objects and advantages will appear in the following specification,and the novel features of my invention will be particularly pointed outin the appended claims.

My invention is illustrated in the accom-' panying drawings forming apart of this application, in which: i

Figure 1 is an end elevation of the device;

Figure 2 is a top plan view of the device;

Figure 3 is a longitudinal section through the device; 1 1

Figure 1 'isa longitudinal-section of the housing and guard; and rFigure 5is-a perspective view of a portion of the housing and guardremoved from the other parts of the device. V

In carrying out my invention I make use of a supportl that carries ashaft 2. The

shaft is rotatably mounted in a bronze bushing 3, r other suitablebearing, and is rotated" by the usual belt and pulley connection, notshown. An oil duct 4 extends through the support 1 and leadstothe shaft2 for the purpose of oiling the shaft.

The parts above described are standard and form no part of my invention,except in so far'asthey cooperate with the parts now to be described. i

On the end of the shaft 2 I mount a cut ter of the shape shown in Figure3, this cutter having teeth 6 that are angular in shape and angularlydisposed, as shown in Figure 5. The cutter is secured in place by ascrew 7 and a washer 8. Figure 3-shows how the cutter bears against ashoulder 9 on the shaft 2.

I enclosethe shaft and cutter in a' housing that comprises a tubularmember 10 and an enlarged portion 11. The housing has its tubular-endinserted into a recess 12, and is held in this recess by friction. Anopening 13 in the housing connects with the duct 4' and with an opening15 in the bushing 3 for permitting oil to pass to the shaft 2. i

The housing carries an adjustable guard that is'composed of three piecesof peculiar shapes. The guard has a semi-circular'portion 16 that mergesinto a ring 17 and'this ring is received in a recessed portion 18 thatextends entirely around the portion 11. The part 16 is held in adjustedposition by a set screw 19 that extends through a T-shaped slot 20. Theslot permits the ring 17 to be rotated slightly with respect to the part11 for adjustment, and then the screw may be tightened for clamping thepart 16 to the part 11.1 V H The part 16 carries two guards '21 and 22.The guard 21 is semi-circular in shape and has a semi-cylindricalportion 23 resting against the ring 17 The portion 23 has slots 24therein, through which set screws 25 extend. The slots 24 extendparallel with the axis of the guard 21 and therefore the guard may bemoved in a direction parallel with the longitudinal axis of the shaft 2.Two set screws 25 are provided and provide means for clamping the guard21 in the desired position. The guard 21 has an inwardly extendingflange 26, see Figure 4:, against which the heel may be placed duringthe cutting operation. The heel is so placed that the top lift will bearagainst the guard 21. This guard may be adjusted so that the cutter 5will only cut the top lift and will not mar the surface of the heelproper.

The other guard 22 is crescent-shaped, and is pivotally secured to thepart 16 at 27, and is adjustably secured at its other endto the part 16by a set screw 28. The set screw 28 is received in a recess 29 in thepart 16, see Figure 5. The outer edge 30 of the guard 22 extends towithin a slight distance of the ends of the teeth 6. The teeth enough toout into the top lift.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood.

The space indicated by X is adjustable, so that the width of this spacewill correspond to the thickness of the top lift. The top lift issecured to the heel in the-usual manner and the portion of the top liftprojecting beyond the sides of the heel must be trimmed down. Heretoforeit has been necessary for the operator to hold the heel in positionwhile pressing. the heel against a cutter having straight teeth insteadof angularly-shaped teeth. If the slightest slip of the operator shouldtake place, the heel would be marred. Furthermore, the straight cuttingteeth would turn up an edge upon the top lift, which would have to becut away by hand.

The angularly-shaped cutters will prevent this edge from forming, but atthe same time there is a tendency to move the heel laterally, due to theinclined teeth. This movement is in the direction of the tubular member10 when the heel is placed in the space X, so that the top lift bearsagainst the flange .26. Of course, the guard 21 will prevent movement ofthe heel as soon as the heel strikes the guard. The guard has beenpreviously adjusted so that the operator can'rest the heel against theguard and know that the cutter will not mar the surface of the heel.

The guard. 22 is stationary and bears against the side of the heel forlimiting the depth at which the cutter operates. The guard is soadjusted that the cutter will trim the top lift down flush with the sideof the heel and no further.

In case the teeth 6 become slightly worn, the guard 22 may be movedinwardly for exposing the extremities of the teeth. In this way thecutter may be used until the teeth are worn approximately down toone-half their former size.

project far Certain operators place their work at a higher point thanothers, this being due to the height of the operator, and to thetendency of his arms to assume a certain position. The T-shaped slot 20permits the two guards to be rocked with respect to the housing 10 sothat the exposed portion of the cutter may be varied to the requirementsof the particular operator.

The device is extremely simple in construction and provides a novelmeans for trimming the top lift of a heel without turningup a rough edgeas is now the case, and without marring the heel proper.

Although I have shown and described one embodiment of my invention, itis to be understood that the same is susceptible of various changes'andI reserve the right to employ such changes as may come within the scopeof the appended claims.

I claim: j

1. The combination with a cutter having angularly-shaped teeth, of ahousing for sai cutter, and blunt edged guards carried by said housing,said guards limiting the cutting effect of the width and depth of thecutter.

2. The combination with a cutter having angularly-shaped teeth, of ahousing for said cutter, blunt edged guards carried by said housing,said guards limiting the cutting ef fect of the width and depth of thecutter, and means permitting adjustment of said guards with respect toeach other and to the housing and for locking them in adjusted position;

3. The combination with a cutter, a housing therefor, said housinghaving an adjustable portion for exposing different parts of the cutter,a guard carried by said portion for limiting the cutting depth of thecutter, and a second guard carried by said adjustable portion forlimiting the effective cutting width of the cutter, said part and guardsbeing adjustable with respect to each other and being secured inadjusted position.

4. A guard for a rotary cutter of the character described comprising aring, means for mounting the same in coaxial relation with the cutter,an extension of the ring extending over the cutter to cover a sectionthereof, and a ring fragment mounted on the first ring with freedom ofaxial adjustment and adapted to be projected over the uncovered portionof the cutter for reducing the efiective length thereof.

5. A guard for a rotary cutter of the character described comprising aring, means for mounting the same in coaxial relation with the cutter,an extension of the ring extending over the cutter to cover a sectionthereof, a front closure for the extension, and a guard adjustablymounted therein for limiting the cutting depth of the cutter.

6. A guard for a rotary cutter of the character described comprising aring, means for mounting the same inrcoaxial relation with the cutter,an extension of the ring extending over the cutter to cover a sectionthereof, a ring fragment mounted on the first ring with freedom of axialadjustment and adapted to be projected over'the uncovered portion of thecutter for reducing the efiective length thereof, a front closure forthe extension, and a guard adjustably mounted therein for limiting thecutting depth of the cutter.

ROBERT J. GROSSMAN.

